A man who accidentally captured the perfect photo of a couple’s incredible mountaintop proposal has launched a search online to find them.

Michigan-based photographer Matthew Dippel was in Yosemite National Park, California, earlier this month photographing the incredible vista when he saw a man and woman appear in his shot.

Before he knew it, the man got down on one knee and produced an engagement ring, putting Dippel in the perfect place to capture an incredible shot of the moment the guy proposed.

Thanks to the sheer distance between view points in the Park, the photographer wouldn’t have been able to simply walk over and share the photo with the couple after the special moment, so Dippel took to Twitter in an attempt to find them.

"Twitter help, idk [I don’t know] who these two are but I hope this finds them. I took this at Taft Point at Yosemite National Park, on October 6th, 2018," the talented photographer posted online along with the picture he captured.

Keen to help Dippel find the couple in the photograph – and find out if she said yes – people from around the world have been sharing the post in the hope that the pair spot it and get in touch.

Despite accumulating over 118,000 retweets, Dippel took to twitter on Friday to reveal that he still hasn’t found the couple in the photograph.

"Still no luck," he wrote. "A lot of people saying they found them but doesn't turn out to be the right couple. If you honestly think you found them message me please!" Fingers crossed he has some more luck soon.